[rfc] pulling of new revisions after merge makes two branches identical?

[Alexander Belchenko]

[bzr.exe 0.8.2]

I have following situation: I have 2 branches (main branch and bugfix 
branch). Bugfix branched from main and have some commits, then merge 
latest revisions from main and again have some commits. E.g., revisions 
tree something like this:

main:    A - C - D ------?
           \       \     /
bugfix:    B - E - F - H

If I do 'bzr pull' from main branch then I don't get message 'Branches 
are diverged try merge' and pull makes two branches identical at the 
point where I mark by '?'. Sometimes this is not desired behaviour.
I suppose that newest revisons as (F,H on my diagram) will be added at 
top of main, but not replace them completely.

I.e. I faulty expect new main history as: A-C-D-F-H
Instead I have new main history as: A-B-E-F-H

Is this intended behaviour or I miss something or this is a bug?
I think, I remember that in older bzr versions this trick was impossible?

I think sometimes this behaviour is good, but sometimes -- not. And I 
cannot revert this pull operation and this last fact is the worst thing 
in this situation.

--
Alexander